Density relay automatic verification system and method, medium, product and host

Abstract

The invention provides a density relay automatic verification system and method, a medium, a product and a host. The verification system comprises a computer host, a number identification module, a positioning module, an intelligent verification control module, a vacuum pumping module and an inflation and deflation module. Scanning a bar code of each to-be-verified density relay to identify a corresponding instrument number, and respectively creating a verification report of each to-be-verified density relay; in response to the verification starting signal, the intelligent verification control module controls the vacuum pumping module to perform vacuum degree verification on each to-be-verified density relay, and controls the inflation and deflation module to perform action point verification and pointer indicating value verification on each to-be-verified density relay; and according to the vacuum degree verification image data, the action point verification image data and the pointer indicating value verification image data returned from the intelligent verification control module, a verification report of each to-be-verified density relay is generated and output, and automation of the whole verification process is realized.

Description

Technical Field

[0001] The present application relates to the technical field of density relay calibration, and in particular to an automatic calibration system, method, medium, product and host for a density relay. Background Art

[0002] With the rapid development of the power industry, SF6 gas, as an excellent insulating and arc-extinguishing medium, has been widely used in high-voltage electrical equipment. Density relays are key components for monitoring SF6 gas density changes. The stability and accuracy of their performance are directly related to the safe operation of the power system. However, in the traditional density relay calibration process, there are the following problems:

[0003] (1) Currently, the calibration of density relays mainly relies on manual operation. Professional inspectors visually inspect the completed density relays and manually input the product numbers. This is not only inefficient, but also prone to manual errors, which directly affects the accuracy and reliability of the calibration results.

[0004] (2) In an environment where multiple instruments and multiple calibrators are working at the same time, the sound alarm when the action point calibration signal is turned on can easily cause auditory confusion, making it difficult for calibrators to accurately determine the source and status of the calibration signal, which not only increases the difficulty of calibration, but also reduces the efficiency of calibration.

[0005] (3) During the density relay calibration process, the calibration results of the action points are only reflected by the signal alarm at the moment of switch on and off. There is a lack of intuitive switch status display, and it is impossible to effectively distinguish and record the status information of different action points, which affects the comprehensiveness and accuracy of the calibration. In particular, for the case of double alarm / double lockout at the same point, the existing calibration method cannot effectively distinguish which action point sent the signal, further increasing the complexity and uncertainty of the calibration.

[0006] (4) During the calibration of the action point and indication, precise control of the amount of inflation and deflation is the key to ensuring the accuracy of the calibration results. However, the currently commonly used manual operation calibration station for manual inflation and deflation has deficiencies in the control of the amount of inflation and deflation, making it difficult to achieve smooth and precise control, which results in poor stability of the pointer deflection and affects the judgment of the calibration accuracy. At the same time, manual operation also increases the uncertainty and error sources in the calibration process.

[0007] (5) The existing calibration method mainly relies on manual reading of the pointer position and recording of data. This method is not only inefficient but also susceptible to human factors. Due to the different visual angles each time and factors such as visual fatigue, manual readings often have deviations. In addition, the calibration report only contains data information obtained manually, lacking intuitive recording methods such as photos and images, making it difficult to fully and accurately reflect the calibration process and results. Summary of the invention

[0008] In view of the shortcomings of the prior art mentioned above, the purpose of the present application is to provide a density relay automatic calibration system, method, medium, product and host, which are used to solve the technical problems in the prior art that the density relay relies on manual operation for calibration, the charging and discharging volume control is inaccurate, the calibration efficiency is low, the operation is complicated, the calibration accuracy is low, and the accuracy and reliability of the calibration results are affected.

[0009] To achieve the above-mentioned purpose and other related purposes, the first aspect of the present application provides a density relay automatic calibration system, including: a computer host, a number recognition module, a positioning module, an intelligent calibration control module, a vacuum pumping module and a charging and discharging module; wherein the positioning module is used to fix multiple density relays to be calibrated; the vacuum pumping module and the charging and discharging module are respectively connected to the positioning module pipeline, and are respectively electrically connected to the intelligent calibration control module; the computer host is respectively electrically connected to the number recognition module, the positioning module, the intelligent calibration control module, and each density relay to be calibrated; the number recognition module is used to scan the barcode of each density relay to be calibrated to identify the corresponding instrument number, and identify the barcode of each density relay to be calibrated. The instrument numbers corresponding to the density relays to be calibrated are sent to the computer host; the computer host is used to create calibration reports for the density relays to be calibrated according to the instrument numbers corresponding to the density relays to be calibrated; in response to the calibration start signal, the intelligent calibration control module controls the vacuum pumping module to perform vacuum calibration on the density relays to be calibrated, controls the charging and discharging module to perform action point calibration and pointer indication calibration on the density relays to be calibrated, and generates and outputs calibration reports for the density relays to be calibrated according to the vacuum calibration image data, action point calibration image data and pointer indication calibration image data transmitted back from the intelligent calibration control module.

[0010] In some embodiments of the first aspect of the present application, the intelligent verification control module includes: an optical detection unit and an intelligent pressure control unit, the optical detection unit and the intelligent pressure control unit are electrically connected to the computer host respectively; the intelligent pressure control unit is electrically connected to and controls the vacuum pumping module and the charging and discharging module; wherein, the method of allowing the intelligent verification control module to control the vacuum pumping module to perform vacuum verification on each of the density relays to be verified includes: according to a preset vacuum value, allowing the intelligent pressure control unit to control the vacuum pumping module to respectively pump air on each of the density relays to be verified to a preset vacuum value; when it is monitored that each of the density relays to be verified reaches a preset vacuum value, allowing the optical detection unit to respectively collect the first image data of each of the density relays to be verified at the preset vacuum value, and extract the corresponding first pointer indication data from the first image data transmitted back by the optical detection unit; wherein, the vacuum verification image data is the first image data; the first image data and the extracted first pointer indication data are entered into the verification report of the corresponding density relay to be verified.

[0011] In some embodiments of the first aspect of the present application, the method of allowing the intelligent verification control module to control the charging and discharging module to perform action point verification on each of the density relays to be verified includes: according to a preset action point pressure value, allowing the intelligent pressure control unit to control the charging and discharging module to inflate each of the density relays to be verified; when it is detected that the action contacts of each of the density relays to be verified are disconnected, allowing the optical detection unit to respectively collect the second image data of each of the density relays to be verified when the action contacts are disconnected, and extract the corresponding second pointer indication data from the second image data transmitted back by the optical detection unit; according to a preset rated pressure value, allowing the intelligent pressure control unit to control the charging and discharging module to continue to inflate each of the density relays to be verified to the preset rated pressure. A fixed pressure value is set; when it is monitored that each of the density relays to be calibrated maintains a first preset time at the preset rated pressure value, the intelligent pressure control unit is controlled to control the charging and discharging module to deflate each of the density relays to be calibrated respectively; when it is monitored that the action contacts of each of the density relays to be calibrated are turned on, the optical detection unit is controlled to respectively collect the third image data of each of the density relays to be calibrated when the action contacts are turned on, and the corresponding third pointer indication data is extracted from the third image data transmitted back by the optical detection unit; wherein, the action point verification image data includes second image data and third image data; the second image data, the third image data and the extracted second pointer indication data and third pointer indication data are entered into the verification report of the corresponding density relay to be calibrated.

[0012] In some embodiments of the first aspect of the present application, the method of allowing the intelligent verification control module to control the charging and discharging module to perform pointer indication verification on each of the density relays to be verified includes: according to the first preset target pressure value, allowing the intelligent pressure control unit to control the charging and discharging module to inflate each of the density relays to be verified to the first preset target pressure value; when it is monitored that each of the density relays to be verified reaches the first preset target pressure value, allowing the optical detection unit to respectively collect the fourth image data of each of the density relays to be verified at the first preset target pressure value, and extract the corresponding fourth pointer indication data from the fourth image data transmitted back by the optical detection unit; according to the preset rated pressure value, allowing the intelligent pressure control unit to control the charging and discharging module to continue to inflate each of the density relays to be verified to the preset rated pressure value; when monitoring When it is detected that each of the density relays to be calibrated maintains a second preset time at the preset rated pressure value, the intelligent pressure control unit controls the charging and discharging module to deflate each of the density relays to be calibrated to the second preset target pressure value according to the second preset target pressure value; when it is monitored that each of the density relays to be calibrated reaches the second preset target pressure value, the optical detection unit is controlled to collect the fifth image data of each of the density relays to be calibrated at the second preset target pressure value, and extract the corresponding fifth pointer indication data from the fifth image data transmitted back by the optical detection unit; wherein the pointer indication verification image data includes fourth image data and fifth image data; the fourth image data, the fifth image data and the extracted fourth pointer indication data and fifth pointer indication data are respectively entered into the verification report of the corresponding density relay to be calibrated.

[0013] In some embodiments of the first aspect of the present application, it also includes multiple switch status display modules, each of which is electrically connected to a density relay to be calibrated; each of the switch status display modules includes multiple instrument contact signal lights, and each instrument contact signal light is electrically connected to the action contact of the corresponding density relay to be calibrated; when the action contact of the density relay to be calibrated is connected, the corresponding instrument contact signal light is on; when the action contact of the density relay to be calibrated is disconnected, the corresponding instrument contact signal light is off.

[0014] In some embodiments of the first aspect of the present application, a pressure test gauge is also included, and the positioning module is connected to the vacuum pumping module and the charging and discharging module pipelines respectively through the pressure test gauge; the pressure test gauge is electrically connected to the computer host for monitoring the pipeline gas pressure.

[0015] To achieve the above-mentioned purpose and other related purposes, the second aspect of the present application provides a density relay automatic calibration method, which is applied to the density relay automatic calibration system as described above; the calibration system includes: a computer host, a number recognition module, a positioning module, an intelligent calibration control module, a vacuum pumping module and a charging and discharging module; the calibration method includes: scanning the barcode of each density relay to be calibrated to identify the corresponding instrument number; creating a calibration report for each density relay to be calibrated according to the instrument number corresponding to each density relay to be calibrated; in response to a calibration start signal, the intelligent calibration control module controls the vacuum pumping module to perform vacuum calibration on each density relay to be calibrated, and controls the charging and discharging module to perform action point calibration and pointer indication calibration on each density relay to be calibrated; and generates and outputs a calibration report for each density relay to be calibrated according to the vacuum calibration image data, action point calibration image data and pointer indication calibration image data transmitted back from the intelligent calibration control module.

[0016] To achieve the above-mentioned purpose and other related purposes, the third aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the automatic density relay calibration method as described above is implemented.

[0017] To achieve the above-mentioned purpose and other related purposes, the fourth aspect of the present application provides a computer program product, which includes a computer program code. When the computer program code runs on a computer, the computer implements the automatic calibration method for density relays as described above.

[0018] To achieve the above-mentioned purpose and other related purposes, the fifth aspect of the present application provides a computer host, including a memory, a processor and a computer program stored in the memory; the processor executes the computer program to implement the automatic calibration method of the density relay as described above.

[0019] As described above, the density relay automatic calibration system, method, medium, product and host of the present application have the following beneficial effects: the automation degree of the entire calibration process is improved, the participation of the calibration personnel in the calibration process can be reduced, the calibration efficiency is improved, and the consistency, authenticity and report integrity of the product during the calibration process are improved, which are mainly reflected in the following aspects:

[0020] (1) With visual recognition technology, the barcode of the density relay to be calibrated can be automatically scanned through the number recognition module to identify the corresponding instrument number, and the identified instrument number is sent to the computer host to fill in and create a calibration report, eliminating manual input errors, and can efficiently, accurately and timely obtain the instrument information of the density relay, thereby improving the practicality of the computer management system.

[0021] (2) It is possible to calibrate multiple density relays to be calibrated at one time. Each density relay to be calibrated is electrically connected to a group of instrument contact signal lights. When each action contact of the density relay to be calibrated is connected, the corresponding instrument contact signal light is lit, and when it is disconnected, the instrument contact signal light is off. During calibration, the calibration personnel can conveniently and quickly judge the signal connection status by observing the on and off status of the signal light, so as to distinguish which action contact is connected or disconnected to send a signal alarm, thereby reducing the difficulty of calibration, eliminating the need to check the instruments one by one, improving the calibration efficiency, reducing the error rate of human judgment, and improving the accuracy and reliability of calibration.

[0022] (3) It is capable of monitoring the switch status of each action contact of each density relay to be calibrated in real time and displaying the switch status. When the action contact is turned on, it is displayed as closed, and when the action contact is turned off, it is displayed as open. The optical detection unit is used to capture the image of the pointer indication corresponding to the change of each action contact, so that the switch status of each action contact of each density relay to be calibrated under different pressures can be intuitively observed and the corresponding pressure value can be recorded, which is convenient for identifying the state of the action contact and improving the verification and judgment efficiency.

[0023] (4) The intelligent calibration control module controls the gas charging and discharging module to automatically charge and discharge each of the density relays to be calibrated, realizing the control switching of positive and negative pressures in the gas circuit, thereby effectively and smoothly controlling the gas charging and discharging volume when calibrating the range, rated pressure value, alarm pressure value, and locking pressure value of the density relay product, and accurately controlling the gas charging and discharging pressure to improve the calibration accuracy. During the indication calibration, the positioning module and the optical detection unit automatically focus the instrument dial and read the accuracy value of the pointer at each preset target pressure point. While reading, the image data of the actual position of the pointer at each calibration point is collected and sent to the computer host to be entered into the calibration report. The positioning module and the optical detection unit can ensure that each density relay to be calibrated maintains the same viewing angle reading, effectively avoiding the influence of different visual angles on the reading accuracy each time, and the acquisition of vacuum degree calibration image data, action point calibration image data, and pointer indication calibration image data facilitates personnel to review the product calibration process. Entering image data in the calibration report is conducive to improving the authenticity and integrity of product calibration, making the calibration report more convincing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Shown is a structural schematic diagram of a density relay automatic calibration system in one embodiment of the present application.

[0025] Figure 2 Shown is a schematic block diagram of a density relay automatic calibration system in one embodiment of the present application.

[0026] Figure 3 Shown is a schematic diagram of the process of performing vacuum degree calibration on a density relay in one embodiment of the present application.

[0027] Figure 4 Shown is a schematic diagram of the process of performing an operating point calibration on a density relay in one embodiment of the present application.

[0028] Figure 5 Shown is a schematic diagram of the process of calibrating the pointer indication of a density relay in one embodiment of the present application.

[0029] Figure 6 Shown is a flow chart of a density relay automatic calibration method in one embodiment of the present application.

[0030] Figure 7 Shown is a schematic block diagram of a computer host in one embodiment of the present application.

[0031] Component number description

[0032] 1 Computer host

[0033] 2 Number identification module

[0034] 3 Positioning module

[0035] 31 Servo motor

[0036] 4 Intelligent calibration control module

[0037] 41 Optical detection unit

[0038] 42 Intelligent pressure control unit

[0039] 5 Vacuum pumping module

[0040] 6. Inflating and deflating module

[0041] 7. Calibration table

[0042] 8 Pressure test table

[0043] 9 Pipeline switch

[0044] 10 Check the start switch

[0045] 11 Instrument contact signal light

[0046] 12 Display screen

[0047] 13 Three-color light for working status DETAILED DESCRIPTION

[0048] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0049] Before further describing the present invention in detail, the nouns and terms involved in the embodiments of the present invention are explained. The nouns and terms involved in the embodiments of the present invention are applicable to the following interpretations:

[0050] <1> Action contacts: refers to the contacts inside the density relay that automatically change their state according to changes in gas density. These contacts are usually connected to the control circuit of the relay and are used to trigger corresponding control actions, such as alarm and lockout, by closing or opening the contacts when the gas density reaches a preset threshold.

[0051] In the prior art, the calibration of density relays mainly relies on manual operation, manual filling of product numbers, manual reading of pointer indication positions and recording of data, which is not only inefficient, but also has problems such as manual acquisition and filling errors, which directly affects the accuracy and reliability of the calibration results. In an environment where multiple instruments and multiple calibration instruments are working at the same time, the sound alarm when the action point calibration signal is turned on is easy to cause auditory confusion, making it difficult for the calibration personnel to accurately judge the source and state of the calibration signal, which not only increases the difficulty of calibration, but also reduces the calibration efficiency. In addition, during the calibration of existing density relays, the calibration results of the action point are only reflected by the signal alarm at the moment of switch on and off, lacking an intuitive switch status display. Finally, in the calibration process of the action point and indication, the precise control of the amount of gas charged and discharged is the key to ensure the accuracy of the calibration results. However, the currently commonly used manual operation calibration station for manual gas charging and discharging has deficiencies in the control of the amount of gas charged and discharged, and it is difficult to achieve smooth and precise control, which leads to poor stability of pointer deflection and affects the judgment of calibration accuracy. At the same time, manual operation also increases the uncertainty and error sources in the calibration process.

[0052] In order to solve the problems in the above-mentioned background technology, the present invention provides a density relay automatic calibration system, method, medium, product and host, aiming to solve the technical problems in the prior art that the density relay relies on manual operation for calibration, the calibration efficiency is low, the operation is complicated, the calibration accuracy is low, and the accuracy and reliability of the calibration results are affected due to inaccurate control of the filling and discharging volume.

[0053] To facilitate understanding of the embodiments of the present application, first Figure 1 Detailed description. Figure 1The structural schematic diagram of the automatic calibration system of the density relay in the embodiment of the present invention is shown. The automatic calibration system of the density relay comprises: a computer host 1, a number recognition module 2, a positioning module 3, an intelligent calibration control module 4, a vacuum pumping module 5 and a charging and discharging module 6; wherein the positioning module 3 is used to fix a plurality of density relays to be calibrated; the vacuum pumping module 5 and the charging and discharging module 6 are respectively connected to the positioning module 3 by pipelines, and are respectively electrically connected to the intelligent calibration control module 4; the computer host 1 is respectively electrically connected to the number recognition module 2, the positioning module 3, the intelligent calibration control module 4, and each density relay to be calibrated.

[0054] The number identification module 2 is used to scan the barcode of each density relay to be calibrated to identify the corresponding instrument number, and send the identified instrument number corresponding to each density relay to be calibrated to the computer host 1.

[0055] The computer host 1 is used to create a calibration report for each density relay to be calibrated according to the instrument number corresponding to each density relay to be calibrated; in response to the calibration start signal, the intelligent calibration control module 4 controls the vacuum pumping module 5 to perform vacuum calibration on each density relay to be calibrated, controls the charging and discharging module 6 to perform action point calibration and pointer indication calibration on each density relay to be calibrated, and generates and outputs a calibration report for each density relay to be calibrated based on the vacuum calibration image data, action point calibration image data and pointer indication calibration image data transmitted back from the intelligent calibration control module 4.

[0056] In this embodiment, the serial number recognition module 2 includes but is not limited to: a laser barcode scanner, an imaging red light barcode scanner, a flatbed scanner, etc.

[0057] In this embodiment, the density relay automatic calibration system also includes a calibration table 7, and the computer host 1, number recognition module 2, positioning module 3, intelligent calibration control module 4, vacuum pumping module 5 and charging and discharging module 6 are all arranged on the calibration table 7.

[0058] In this embodiment, the positioning module 3 includes a plurality of clamping ports and a servo motor 31, and the servo motor 31 is electrically connected to the computer host 1. After the number recognition module 2 scans the barcode of each density relay to be calibrated to identify the corresponding instrument number, the computer host 1 controls the servo motor 31 to transport each density relay to be calibrated to the corresponding clamping port to complete the positioning of each density relay to be calibrated, so that the calibration work of multiple density relays to be calibrated of the same specification can be completed at one time, thereby improving the calibration efficiency.

[0059] In this embodiment, when the computer host 1 receives the instrument number corresponding to each density relay to be calibrated, it automatically creates a calibration report to prepare for calibration, and fills the data in the calibration process into the calibration report.

[0060] In this embodiment, the computer host 1 controls the vacuum pumping module 5 to perform vacuum calibration on each density relay to be calibrated, and controls the charging and discharging module 6 to perform action point calibration and pointer indication calibration on each density relay to be calibrated according to the range of the configured density relay to be calibrated, the preset vacuum value, the preset rated pressure value, the preset action point pressure value and the preset target pressure value, through the intelligent calibration control module 4, to achieve control switching of positive and negative pressure in the gas circuit, as well as automatic charging and discharging functions, and effectively and steadily control the charging and discharging volume when calibrating the range, rated pressure value, alarm pressure value and locking pressure value of the density relay product, and can accurately control the charging and discharging pressure, and the pressure load change rate near the test point is not more than 1% of the range per second.

[0061] In this embodiment, if Figure 2 As shown, it is a schematic block diagram of the automatic density relay verification system in an embodiment of the present invention. Figure 3 As shown, it is a schematic diagram of the process of vacuum calibration of density relays in an embodiment of the present invention. The intelligent calibration control module 4 includes: an optical detection unit 41 and an intelligent pressure control unit 42, and the optical detection unit 41 and the intelligent pressure control unit 42 are electrically connected to the computer host 1 respectively; the intelligent pressure control unit 42 is electrically connected to and controls the vacuum pumping module 5 and the charging and discharging module 6; wherein, the method of making the intelligent calibration control module 4 control the vacuum pumping module 5 to perform vacuum calibration on each of the density relays to be calibrated includes:

[0062] S301: According to a preset vacuum value, the intelligent pressure control unit controls the vacuum pumping module to pump air into each of the density relays to be calibrated to a preset vacuum value.

[0063] In this embodiment, the automatic calibration system for the density relay further includes a pressure test gauge 8, through which the positioning module 3 is respectively connected to the vacuum pumping module 5 and the gas charging and discharging module 6; the pressure test gauge 8 is electrically connected to the computer host 1 for monitoring the pipeline gas pressure. A pipeline switch 9 is provided between the pressure test gauge 8 and the positioning module 3, and the pipeline switch 9 is electrically connected to the intelligent pressure control unit 42. In this way, by monitoring the pipeline gas pressure connected to the positioning module 3, the gas pressure in each of the density relays to be calibrated fixed on the positioning module 3 can be obtained.

[0064] In this embodiment, the vacuum pumping module 5 includes a vacuum pump, which is electrically connected to the intelligent pressure control unit 42 and connected to the positioning module 3 via a pipeline.

[0065] S302: When it is monitored that each of the density relays to be calibrated reaches a preset vacuum value, the optical detection unit is instructed to respectively collect the first image data of each of the density relays to be calibrated at the preset vacuum value, and extract the corresponding first pointer indication data from the first image data transmitted back by the optical detection unit; wherein the vacuum calibration image data is the first image data.

[0066] In this embodiment, the automatic calibration system for density relays further includes a calibration start switch 10 disposed on the calibration table 7. When the calibration start switch 10 is pressed, the computer host 1 controls the intelligent pressure control unit 42 to control the vacuum pumping module 5 to respectively evacuate each of the density relays to be calibrated to the preset vacuum value according to the preset vacuum value. The intelligent pressure control unit 42 controls the pipeline switch 9 to open, and starts the vacuum pump to continuously evacuate each of the density relays to be calibrated. When the pressure test gauge 8 detects that the gas in the pipeline reaches the preset vacuum value, the intelligent pressure control unit 42 controls the pipeline switch 9 to close, and after shutting down the vacuum pump, the optical detection unit 41 takes a picture of the pointer indication of each of the density relays to be calibrated at the preset vacuum value, obtains the first image data, and extracts the corresponding first pointer indication data from the first image data transmitted back by the optical detection unit 41.

[0067] S303: Enter the first image data and the extracted first pointer indication data into a verification report corresponding to the density relay to be verified.

[0068] In this embodiment, the computer host 1 enters the first image data returned by the optical detection unit 41 and the first pointer indication data extracted from the first image data into the verification report corresponding to the density relay to be verified.

[0069] In this embodiment, the optical detection unit 41 includes a plurality of cameras, which are arranged above the clamping port of the positioning module 3. The number of the cameras is the same as the number of the clamping ports, so that the image data of the density relay to be checked fixed at the clamping port can be collected. In this way, the positioning module 3 and the optical detection unit 41 can ensure that each density relay to be checked maintains the same viewing angle reading, effectively avoiding the influence of different visual angles of each time on the reading accuracy, and the acquisition of vacuum degree verification image data, action point verification image data and pointer indication verification image data facilitates personnel to review the product verification process, and entering image data in the verification report is conducive to improving the authenticity and integrity of product verification, making the verification report more convincing.

[0070] In this embodiment, the automatic density relay calibration system further includes a plurality of switch status display modules, each of which is electrically connected to a density relay to be calibrated; each of which includes a plurality of instrument contact signal lights 11, each of which is electrically connected to the corresponding action contact of the density relay to be calibrated; when the action contact of the density relay to be calibrated is turned on, the corresponding instrument contact signal light 11 is on; when the action contact of the density relay to be calibrated is turned off, the corresponding instrument contact signal light 11 is off. In this way, it is convenient for the calibration personnel to quickly determine the signal connection status by observing the on and off status of the instrument contact signal light.

[0071] In this embodiment, the density relay automatic calibration system also includes a display screen 12 electrically connected to the computer host 1, and the display screen 12 is used to display the calibration report of each density relay to be calibrated output by the computer host 1 and the switch status of the action contacts of each density relay to be calibrated.

[0072] It is worth noting that by displaying the switching status of each actuating contact of each density relay to be calibrated on the display screen 12, displaying closed when the actuating contact is turned on, and displaying open when the actuating contact is turned off, the switching status of each actuating contact of each density relay to be calibrated under different pressures can be intuitively observed, which facilitates the identification of the actuating contact status and improves the verification and judgment efficiency.

[0073] In this embodiment, the density relay to be checked has multiple action contacts, including multiple alarm action contacts and multiple locking action contacts. Exemplarily, the density relay to be checked has four action contacts P1, P2, P3, and P4, P1 and P2 are alarm action contacts, P3 and P4 are locking action contacts, and the action contacts P1, P2, P3, and P4 of the density relay to be checked are electrically connected to an instrument contact signal light 11 respectively. The alarm pressure values ​​of the alarm action contacts P1 and P2 are both 0.5MPa. When the gas pressure value in the density relay to be checked is above 0.5MPa, the alarm action contacts P1 and P2 are disconnected, the corresponding connected instrument contact signal lights 11 are all off, and the display screen 12 displays "P1 is open" and "P2 is open". When the gas pressure value in the density relay to be checked is below 0.5MPa, the alarm action contacts P1 and P2 are turned on, the corresponding connected instrument contact signal lights 11 are all on, and the display screen 12 displays "P1 is closed" and "P2 is closed". If the alarm action contact is conducting and the corresponding connected instrument contact signal light 11 is not lit, it means that there is an abnormality in the alarm action contact connected to the unlit instrument contact signal light 11, and the calibration personnel are notified to check it in time. The computer host 1 receives the switch signal of the action contact of the density relay to be calibrated, and displays the switch status of the action contact on the display screen 12.

[0074] In this embodiment, illustratively, the locking pressure values ​​of the locking action contacts P3 and P4 of the density relay to be verified are both 0.2MPa. When the gas pressure value in the density relay to be verified is above 0.2MPa, the locking action contacts P3 and P4 are disconnected, the instrument contact signal light 11 is off, and the display screen 12 displays "P3 is open" and "P4 is open". When the gas pressure value in the density relay to be verified is below 0.2MPa, the locking action contacts P3 and P4 are connected, the instrument contact signal light 11 is on, and the display screen 12 displays "P3 is closed" and "P4 is closed". If the locking action contact is connected and the corresponding connected instrument contact signal light 11 is not lit, it means that there is an abnormality in the locking action contact connected to the unlit instrument contact signal light 11, and the verification personnel are notified to check it in time.

[0075] In this embodiment, if Figure 4 As shown, it is a schematic diagram of the process of performing an action point calibration on a density relay in an embodiment of the present invention. The method of allowing the intelligent calibration control module to control the charging and discharging module to perform an action point calibration on each of the density relays to be calibrated includes:

[0076] S401: According to a preset action point pressure value, the intelligent pressure control unit controls the charging and discharging module to inflate each of the density relays to be calibrated.

[0077] In this embodiment, the inflation and deflation module 6 includes a pressure pump, which is electrically connected to the intelligent pressure control unit 42 and connected to the positioning module 3 via a pipeline.

[0078] In this embodiment, the preset action point pressure value may be a preset alarm action point pressure value or a preset locking action point pressure value.

[0079] S402: When it is detected that the action contacts of each of the density relays to be checked are disconnected, the optical detection unit is instructed to respectively collect the second image data of each of the density relays to be checked when the action contacts are disconnected, and the corresponding second pointer indication data is extracted from the second image data transmitted back by the optical detection unit.

[0080] In this embodiment, when the action point of each density relay to be checked is checked, since the density relay to be checked is in a vacuum state and has no gas, the action contact of the density relay to be checked is in a normally closed state, and at this time, the corresponding connected instrument contact signal light 11 is on. The computer host 1 controls the pipeline switch 9 to open according to the preset action point pressure value, and starts the pressure pump to inflate each density relay to be checked, and monitors the gas pressure in the pipeline through the pressure test gauge 8. As the gas pressure in each density relay to be checked increases, when the gas pressure in each density relay to be checked reaches above the preset action point pressure value, the action contact of each density relay to be checked will be disconnected. When the action contacts of each of the density relays to be calibrated are disconnected, the corresponding instrument contact signal lights 11 go out, the computer host 1 receives the switching signals of the action contacts of the density relays to be calibrated, and displays the switching status of the action contacts on the display screen 12, and instructs the optical detection unit 41 to take a picture of the pointer indication of each of the density relays to be calibrated when the action contacts are disconnected, to obtain second image data, and extract the corresponding second pointer indication data from the second image data transmitted back by the optical detection unit 41.

[0081] S403: According to the preset rated pressure value, the intelligent pressure control unit controls the charging and discharging module to continue to inflate each of the density relays to be calibrated to the preset rated pressure value.

[0082] In this embodiment, each of the density relays to be calibrated is continuously inflated to a preset rated pressure value and maintained for 1 minute.

[0083] S404: When it is monitored that each of the density relays to be calibrated maintains a preset rated pressure value for a first preset time, the intelligent pressure control unit is instructed to control the charging and discharging module to deflate each of the density relays to be calibrated.

[0084] In this embodiment, the intelligent pressure control unit 42 controls the pressure pump to continue to inflate each of the density relays to be calibrated. When the pressure test gauge 8 detects that the gas in the pipeline has reached a preset rated pressure value, the intelligent pressure control unit 42 controls the pressure pump so that each of the density relays to be calibrated maintains the preset rated pressure value for a first preset time, and then controls the pressure pump to deflate each of the density relays to be calibrated.

[0085] S405: When it is monitored that the action contacts of each density relay to be checked are turned on, the optical detection unit is instructed to respectively collect the third image data of each density relay to be checked when the action contacts are turned on, and extract the corresponding third pointer indication data from the third image data transmitted back by the optical detection unit; wherein the action point verification image data includes the second image data and the third image data.

[0086] In this embodiment, the intelligent pressure control unit 42 controls the pressure pump to deflate each of the density relays to be checked, and the gas pressure in the pipeline is monitored by the pressure test gauge 8. As the gas pressure in each of the density relays to be checked decreases, after the gas pressure in each of the density relays to be checked drops below the preset action point pressure value, the action contacts of each of the density relays to be checked will be turned on. When the action contacts of each of the density relays to be checked are turned on, the corresponding connected instrument contact signal light 11 lights up, the computer host 1 receives the switch signal of the action contact of the density relay to be checked, and displays the switch state of the action contact on the display screen 12, and instructs the optical detection unit 41 to take a picture of the pointer indication of each of the density relays to be checked when the action contact is turned on, to obtain the third image data, and extract the corresponding third pointer indication data from the third image data transmitted back by the optical detection unit.

[0087] In this embodiment, if the gas pressure in the density relay to be calibrated drops below the preset action point pressure value, the action contact of the density relay to be calibrated is turned on, but the instrument contact signal light 11 connected to the action contact is not lit, then there is a conduction abnormality in the action contact, reminding the inspection personnel to check in time.

[0088] S406: Enter the second image data, the third image data, and the extracted second pointer indication data and third pointer indication data into the verification report of the density relay to be verified.

[0089] In this embodiment, the computer host 1 enters the second image data, the third image data transmitted back by the optical detection unit 41, and the second pointer indication data, the third pointer indication data extracted from the second image data, the third image data into the verification report of the corresponding density relay to be verified.

[0090] In this embodiment, illustratively, the alarm action contact of the density relay to be checked is P1, the preset alarm action point pressure value is 0.5MPa, and the preset rated pressure value is 0.6MPa. After the vacuum degree of the density relay to be checked is checked, since the density relay to be checked is in a vacuum state and there is no gas, the action contact P1 of the density relay to be checked is in a normally closed state. At this time, the corresponding connected instrument contact signal light 11 is on, and the display screen 12 shows that the state of the alarm action contact P1 of the density relay to be checked is "P1 closed". The intelligent pressure control unit 42 controls the pipeline switch 9 to open, and starts the pressure pump to inflate each of the density relays to be verified, and monitors the gas pressure in the pipeline through the pressure test gauge 8. As the gas pressure in each of the density relays to be verified increases, when the gas pressure in each of the density relays to be verified reaches above 0.5MPa, the alarm action contact P1 of the density relay to be verified is disconnected, and the corresponding connected instrument contact signal light 11 goes out. The computer host 1 receives the switch signal of the alarm action contact P1 of the density relay to be verified, and displays the switch state of the alarm action contact P1 on the display screen 12, displaying "P1 is open". At this time, the pointer indication of the density relay to be verified may be 0.505MPa. The computer host 1 instructs the optical detection unit 41 to take a picture of the actual pointer indication to obtain the second image data, and extracts the corresponding second pointer indication data from the second image data transmitted back by the optical detection unit 41, and enters it into the verification report. The intelligent pressure control unit 42 controls the pressure pump to continue to inflate each of the density relays to be verified to 0.6MPa and maintain for 1 minute, and then controls the pressure pump to deflate each of the density relays to be verified. When the gas pressure in each of the density relays to be verified drops below 0.5MPa, the alarm action contact P1 of each of the density relays to be verified is turned on, and the corresponding connected instrument contact signal light 11 is on. The computer host 1 receives the switch signal of the alarm action contact P1 of the density relay to be verified, and displays the switch state of the alarm action contact P1 on the display screen 12, showing "P1 closed". At this time, the pointer indication of the density relay to be verified may be 0.497MPa. The computer host 1 instructs the optical detection unit 41 to take a photo of the actual pointer indication to obtain the third image data, and extracts the corresponding third pointer indication data from the third image data transmitted back by the optical detection unit 41, and enters it into the verification report. The verification process of the locking action point of the density relay to be verified is similar to the above, and will not be repeated here.

[0091] In this embodiment, if Figure 5As shown, it is a schematic diagram of the process of performing pointer indication verification on the density relay in an embodiment of the present invention. The method of allowing the intelligent verification control module to control the charging and discharging module to perform pointer indication verification on each of the density relays to be verified includes:

[0092] S501: According to a first preset target pressure value, the intelligent pressure control unit controls the charging and discharging module to inflate each of the density relays to be calibrated to the first preset target pressure value.

[0093] In this embodiment, after the operating point of each density relay to be calibrated is calibrated and the gas therein is deflated to zero, the charging and discharging module 6 is controlled to inflate each density relay to be calibrated to a first preset target pressure value.

[0094] S502: When it is monitored that each of the density relays to be calibrated reaches the first preset target pressure value, the optical detection unit is instructed to respectively collect the fourth image data of each of the density relays to be calibrated under the first preset target pressure value, and the corresponding fourth pointer indication data is extracted from the fourth image data transmitted back by the optical detection unit.

[0095] In this embodiment, the gas pressure in the pipeline is monitored by the pressure test gauge 8, and the gas pressure in each density relay to be calibrated fixed on the positioning module 3 can be obtained. When the gas pressure in the pipeline reaches the first preset target pressure value, the optical detection unit 41 is used to collect the actual pointer indication image data of each density relay to be calibrated under the first preset target pressure value to obtain the fourth image data, and the corresponding fourth pointer indication data is extracted from the fourth image data transmitted back by the optical detection unit 41 and entered into the calibration report.

[0096] S503: According to the preset rated pressure value, the intelligent pressure control unit controls the charging and discharging module to continue to inflate each of the density relays to be calibrated to the preset rated pressure value.

[0097] In this embodiment, each of the density relays to be calibrated is continuously inflated to a preset rated pressure value and maintained for 3 minutes.

[0098] S504: When it is monitored that each of the density relays to be calibrated maintains a second preset time at the preset rated pressure value, the intelligent pressure control unit controls the charging and discharging module to deflate each of the density relays to be calibrated to the second preset target pressure value according to the second preset target pressure value.

[0099] In this embodiment, the intelligent pressure control unit 42 controls the charging and discharging module 6 so that each of the density relays to be calibrated is maintained at the preset rated pressure value for a second preset time, and then controls the charging and discharging module 6 to deflate each of the density relays to be calibrated to a second preset target pressure value. The load change speed of the intelligent pressure control unit 42 controlling the charging and discharging module 6 to charge and discharge each of the density relays to be calibrated should not be greater than 1% of the range per second.

[0100] S505: When it is monitored that each of the density relays to be calibrated reaches the second preset target pressure value, the optical detection unit is instructed to respectively collect the fifth image data of each of the density relays to be calibrated at the second preset target pressure value, and the corresponding fifth pointer indication data is extracted from the fifth image data transmitted back by the optical detection unit; wherein the pointer indication verification image data includes the fourth image data and the fifth image data.

[0101] In this embodiment, when it is monitored that each of the density relays to be calibrated reaches the second preset target pressure value, the optical detection unit 41 is controlled to respectively collect the actual pointer indication image data of each of the density relays to be calibrated at the second preset target pressure value to obtain the fifth image data, and the corresponding fifth pointer indication data is extracted from the fifth image data transmitted back by the optical detection unit 41 and entered into the calibration report.

[0102] S506: respectively entering the fourth image data, the fifth image data and the extracted fourth pointer indication data and the fifth pointer indication data into the verification report of the corresponding density relay to be verified.

[0103] In this embodiment, when the gas pressure in the density relay to be calibrated reaches an indication check point, the optical detection unit 41 takes a picture of the pointer indication of the indication check point, and enters the pointer indication data and image data obtained each time into the calibration report.

[0104] In this embodiment, after the vacuum degree, the action point and the pointer indication of each density relay to be calibrated are calibrated, the computer host 1 organizes and automatically generates a calibration report for each density relay to be calibrated for output.

[0105] In this embodiment, the density relay automatic verification system further includes a working status three-color light 13, and the working status three-color light 13 is electrically connected to the computer host 1. When the working status of the density relay automatic verification system is normal, the working status three-color light 13 is displayed in green. When the density relay automatic verification system has a serious fault, the working status three-color light 13 is displayed in red. When the density relay automatic verification system is in the preparation stage, standby state or has a minor fault, the working status three-color light 13 is displayed in orange.

[0106] It is worth noting that the automatic calibration system for density relays of the present invention improves the automation of the entire calibration process, can reduce the involvement of calibration personnel in the calibration process, improves the calibration efficiency, and enhances the consistency, authenticity and report integrity of the product during the calibration process, which is mainly reflected in the following aspects:

[0107] (1) With visual recognition technology, the barcode of the density relay to be calibrated can be automatically scanned through the number recognition module to identify the corresponding instrument number, and the identified instrument number is sent to the computer host to fill in and create a calibration report, eliminating manual input errors, and can efficiently, accurately and timely obtain the instrument information of the density relay, thereby improving the practicality of the computer management system.

[0108] (2) The density relay automatic calibration system of the present invention can calibrate multiple density relays to be calibrated at one time. Each density relay to be calibrated is electrically connected to a group of instrument contact signal lights. When each action contact of the density relay to be calibrated is connected, the corresponding instrument contact signal light is lit, and when it is disconnected, the instrument contact signal light is off. During calibration, the calibration personnel can conveniently and quickly judge the signal connection status by observing the on and off status of the signal light, so as to distinguish which action contact is connected or disconnected to send out the signal alarm, thereby reducing the difficulty of calibration and eliminating the need to check the instruments one by one, thereby improving the calibration efficiency, reducing the error rate of human judgment, and improving the accuracy and reliability of calibration.

[0109] (3) The automatic density relay calibration system of the present invention can monitor the switch status of each action contact of each density relay to be calibrated in real time and display the switch status. When the action contact is turned on, it is displayed as closed, and when the action contact is turned off, it is displayed as open. The optical detection unit captures the image of the pointer indication corresponding to the change of each action contact, so that the switch status of each action contact of each density relay to be calibrated under different pressures can be intuitively observed and the corresponding pressure value can be recorded, which facilitates the identification of the action contact status and improves the calibration and judgment efficiency.

[0110] (4) The intelligent calibration control module controls the gas charging and discharging module to automatically charge and discharge each of the density relays to be calibrated, realizing the control switching of positive and negative pressures in the gas circuit, thereby effectively and smoothly controlling the gas charging and discharging volume when calibrating the range, rated pressure value, alarm pressure value, and locking pressure value of the density relay product, and accurately controlling the gas charging and discharging pressure to improve the calibration accuracy. During the indication calibration, the positioning module and the optical detection unit automatically focus the instrument dial and read the accuracy value of the pointer at each preset target pressure point. While reading, the image data of the actual position of the pointer at each calibration point is collected and sent to the computer host to be entered into the calibration report. The positioning module and the optical detection unit can ensure that each density relay to be calibrated maintains the same viewing angle reading, effectively avoiding the influence of different visual angles on the reading accuracy each time, and the acquisition of vacuum degree calibration image data, action point calibration image data, and pointer indication calibration image data facilitates personnel to review the product calibration process. Entering image data in the calibration report is conducive to improving the authenticity and integrity of product calibration, making the calibration report more convincing.

[0111] In the embodiments of the present application, words such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. For example, the first image data and the second image data are only used to distinguish different image data, and their order is not limited. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit them to be different.

[0112] It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" represent examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0113] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can represent: a, b, c, ab, ac, bc or abc, where a, b, c can be single or multiple.

[0114] like Figure 6 As shown, a flow chart of the automatic calibration method of the density relay in the embodiment of the present invention is shown. The automatic calibration method of the density relay in this embodiment is applied to the automatic calibration system of the density relay as described above; the calibration system includes: a computer host, a number recognition module, a positioning module, an intelligent calibration control module, a vacuum pumping module and a charging and discharging module; wherein the positioning module is used to fix a plurality of density relays to be calibrated; the vacuum pumping module and the charging and discharging module are respectively connected to the positioning module pipeline, and are respectively electrically connected to the intelligent calibration control module; the computer host is respectively electrically connected to the number recognition module, the positioning module, the intelligent calibration control module, and each density relay to be calibrated; the calibration method includes:

[0115] S601: Scan the barcode of each density relay to be calibrated to identify the corresponding instrument number.

[0116] S602: Creating a calibration report for each density relay to be calibrated according to the instrument number corresponding to each density relay to be calibrated.

[0117] S603: In response to the verification start signal, the intelligent verification control module controls the vacuum pumping module to perform vacuum degree verification on each density relay to be verified, and controls the charging and discharging module to perform action point verification and pointer indication verification on each density relay to be verified.

[0118] S604: Generate and output a calibration report for each density relay to be calibrated based on the vacuum calibration image data, the action point calibration image data and the pointer indication calibration image data transmitted back from the intelligent calibration control module.

[0119] The density relay automatic calibration method provided in the above embodiment is applied to the density relay automatic calibration system, and has the same concept as the system embodiment. The specific implementation process is detailed in the system embodiment and will not be repeated here.

[0120] Figure 7 is a schematic block diagram of a computer host provided in an embodiment of the present application. Figure 7 As shown, the computer host 1 includes: at least one processor 701, a memory 702, at least one network interface 703 and a user interface 705. The various components in the device are coupled together through a bus system 704. It can be understood that the bus system 704 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 704 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, Figure 7 In the specification, various buses are labeled as bus systems.

[0121] The user interface 705 may include a display, a keyboard, a mouse, a trackball, a click gun, keys, buttons, a touch pad or a touch screen.

[0122] It is understood that the memory 702 can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), which is used as an external cache. By way of exemplary but not limiting explanation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM). The memory described in the embodiments of the present invention is intended to include but is not limited to these and any other suitable categories of memory.

[0123] The memory 702 in the embodiment of the present invention is used to store various types of data to support the operation of the computer host 1. Examples of these data include: any executable program for operating on the computer host 1, such as an operating system 7021 and an application 7022; the operating system 7021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. The application 7022 can include various applications, such as a media player (Media Player), a browser (Browser), etc., for implementing various application services. The automatic calibration method for the density relay provided in the embodiment of the present invention can be included in the application 7022.

[0124] The method disclosed in the above embodiment of the present invention can be applied to the processor 701, or implemented by the processor 701. The processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 701 or the instruction in the form of software. The above processor 701 may be a general processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The processor 701 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiment of the present invention. The general processor 701 may be a microprocessor or any conventional processor, etc. In combination with the steps of the accessory optimization method provided in the embodiment of the present invention, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0125] In an exemplary embodiment, the computer host 1 can be used by one or more application specific integrated circuits (ASIC), DSP, programmable logic device (PLD), complex programmable logic device (CPLD) to execute the above method.

[0126] According to the method provided in the embodiment of the present application, the present application also provides a computer program product, which includes: a computer program code, when the computer program code is run on a computer, the computer executes Figures 3 to 6 A method according to any one of the embodiments shown.

[0127] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable storage medium, which stores a program code, and when the program code is run on a computer, the computer executes Figures 3 to 6 A method according to any one of the embodiments shown.

[0128] The terms "component", "module", "system", etc. used in this specification are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program and / or a computer. By way of illustration, both applications running on a computing device and a computing device can be components. One or more components may reside in a process and / or an execution thread, and a component may be located on a computer and / or distributed between two or more computers. In addition, these components may be executed from various computer-readable media having various data structures stored thereon. Components may, for example, communicate through local and / or remote processes according to signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system and / or a network, such as the Internet interacting with other systems through signals).

[0129] Those skilled in the art will appreciate that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or in a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0130] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0131] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0132] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0133] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0134] In the above embodiments, the functions of each functional unit can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When loading and executing computer program instructions (programs) on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. Computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media integrations. Available media may be magnetic media (e.g., floppy disks, hard disks, tapes), optical media (e.g., high-density digital video discs (DVDs), or semiconductor media (e.g., solid state disks (SSDs), etc.).

[0135] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

[0136] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0137] In summary, the present invention provides a density relay automatic calibration system, method, medium, product and host, which improves the automation of the entire calibration process, can reduce the involvement of the calibration personnel in the calibration process, improves the calibration efficiency, and enhances the consistency, authenticity and report integrity of the product during the calibration process. Therefore, the present application effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0138] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A density relay automatic calibration system, characterized in that: include: Computer host, number recognition module, positioning module, intelligent verification control module, vacuum pumping module and charging and discharging module; The positioning module is used to fix a plurality of density relays to be checked; the vacuum pumping module and the gas charging and discharging module are respectively connected to the positioning module pipeline, and are respectively electrically connected to the intelligent verification control module; the computer host is respectively electrically connected to the number recognition module, the positioning module, the intelligent verification control module, and each density relay to be checked; The number recognition module is used to scan the barcode of each density relay to be calibrated to identify the corresponding instrument number, and send the identified instrument number corresponding to each density relay to be calibrated to the computer host; The computer host is used to create a calibration report for each density relay to be calibrated according to the instrument number corresponding to each density relay to be calibrated; In response to the verification start signal, the intelligent verification control module controls the vacuum pumping module to perform vacuum verification on each density relay to be verified, controls the charging and discharging module to perform action point verification and pointer indication verification on each density relay to be verified, and generates and outputs a verification report for each density relay to be verified based on the vacuum verification image data, action point verification image data and pointer indication verification image data transmitted back from the intelligent verification control module.

2. The density relay automatic calibration system according to claim 1, characterized in that: The intelligent verification control module includes: an optical detection unit and an intelligent pressure control unit, the optical detection unit and the intelligent pressure control unit are electrically connected to the computer host respectively; the intelligent pressure control unit is electrically connected to and controls the vacuum pumping module and the charging and discharging module; wherein the method of making the intelligent verification control module control the vacuum pumping module to perform vacuum degree verification on each of the density relays to be verified includes: According to the preset vacuum value, the intelligent pressure control unit controls the vacuum pumping module to pump air to the preset vacuum value for each density relay to be calibrated; When it is detected that each of the density relays to be checked reaches a preset vacuum value, the optical detection unit is instructed to respectively collect first image data of each of the density relays to be checked under the preset vacuum value, and extract corresponding first pointer indication data from the first image data transmitted back by the optical detection unit; wherein the vacuum verification image data is the first image data; The first image data and the extracted first pointer indication data are entered into a verification report corresponding to the density relay to be verified.

3. The automatic density relay calibration system according to claim 2, characterized in that: The method of enabling the intelligent verification control module to control the gas charging and discharging module to perform action point verification on each of the density relays to be verified includes: According to the preset action point pressure value, the intelligent pressure control unit controls the charging and discharging module to inflate each of the density relays to be calibrated; When it is detected that the action contacts of the density relays to be checked are disconnected, the optical detection unit is made to respectively collect the second image data of the density relays to be checked when the action contacts are disconnected, and the corresponding second pointer indication data is extracted from the second image data transmitted back by the optical detection unit; According to the preset rated pressure value, the intelligent pressure control unit controls the charging and discharging module to continue to inflate each of the density relays to be calibrated to the preset rated pressure value; When it is monitored that each of the density relays to be calibrated maintains a preset rated pressure value for a first preset time, the intelligent pressure control unit controls the charging and discharging module to deflate each of the density relays to be calibrated respectively; When it is detected that the action contacts of the density relays to be checked are turned on, the optical detection unit is made to respectively collect the third image data of the density relays to be checked when the action contacts are turned on, and the corresponding third pointer indication data is extracted from the third image data transmitted back by the optical detection unit; wherein the action point verification image data includes the second image data and the third image data; The second image data, the third image data and the extracted second pointer indication data and third pointer indication data are entered into the verification report of the corresponding density relay to be verified.

4. The automatic density relay calibration system according to claim 2, characterized in that: The method of enabling the intelligent verification control module to control the gas charging and discharging module to perform pointer indication verification on each of the density relays to be verified includes: According to the first preset target pressure value, the intelligent pressure control unit controls the charging and discharging module to inflate each of the density relays to be calibrated to the first preset target pressure value; When it is monitored that each of the density relays to be verified reaches the first preset target pressure value, the optical detection unit is instructed to respectively collect fourth image data of each of the density relays to be verified under the first preset target pressure value, and extract corresponding fourth pointer indication data from the fourth image data transmitted back by the optical detection unit; According to the preset rated pressure value, the intelligent pressure control unit controls the charging and discharging module to continue to inflate each of the density relays to be calibrated to the preset rated pressure value; When it is monitored that each of the density relays to be calibrated maintains a second preset time at the preset rated pressure value, the intelligent pressure control unit controls the charging and discharging module to deflate each of the density relays to be calibrated to the second preset target pressure value according to the second preset target pressure value; When it is monitored that each of the density relays to be verified reaches the second preset target pressure value, the optical detection unit is instructed to respectively collect fifth image data of each of the density relays to be verified at the second preset target pressure value, and extract corresponding fifth pointer indication data from the fifth image data transmitted back by the optical detection unit; wherein the pointer indication verification image data includes the fourth image data and the fifth image data; The fourth image data, the fifth image data and the extracted fourth pointer indication data and the fifth pointer indication data are respectively entered into the verification report of the corresponding density relay to be verified.

5. The density relay automatic calibration system according to claim 1, characterized in that: It also includes multiple switch status display modules, each of which is electrically connected to a density relay to be calibrated; each of the switch status display modules includes multiple instrument contact signal lights, and each instrument contact signal light is electrically connected to the action contact of the corresponding density relay to be calibrated; when the action contact of the density relay to be calibrated is turned on, the corresponding instrument contact signal light is on; when the action contact of the density relay to be calibrated is disconnected, the corresponding instrument contact signal light is off.

6. The density relay automatic calibration system according to claim 2, characterized in that: It also includes a pressure test gauge, through which the positioning module is respectively connected to the vacuum pumping module and the charging and discharging module pipelines; the pressure test gauge is electrically connected to the computer host to monitor the pipeline gas pressure.

7. A density relay automatic calibration method, characterized in that: The automatic calibration system for density relays according to any one of claims 1 to 6; the calibration system comprises: a computer host, a number recognition module, a positioning module, an intelligent calibration control module, a vacuum pumping module and a charging and discharging module; the calibration method comprises: Scanning the barcode of each density relay to be calibrated to identify the corresponding instrument number; Creating calibration reports for the density relays to be calibrated, respectively, according to the instrument numbers corresponding to the density relays to be calibrated; In response to the verification start signal, the intelligent verification control module controls the vacuum pumping module to perform vacuum degree verification on each of the density relays to be verified, and controls the charging and discharging module to perform action point verification and pointer indication verification on each of the density relays to be verified; A calibration report for each density relay to be calibrated is generated and output based on the vacuum calibration image data, the action point calibration image data and the pointer indication calibration image data transmitted back from the intelligent calibration control module.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, the automatic calibration method for density relays as described in claim 7 is implemented.

9. A computer program product, characterized in that The computer program product includes computer program code, and when the computer program code is executed on a computer, the computer implements the automatic calibration method for a density relay as claimed in claim 7.

10. A computer host, comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the density relay automatic calibration method as claimed in claim 7.

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